Booster car seat



FIG. 1 is a perspective view of the booster car seat showing the design of my invention;

FIG. 2 is a right side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a top view thereof.

The left side view is a mirror image of the right side view.

The bottom of the booster car seat is plain and unadorned. 

The ornamental design for a booster car seat, as shown and described. 